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| Illustration 1 | g00846549 |
View of the left hand side of the swing frame (1) Pilot manifold (2) Line to the pilot accumulator (3) Test port (pilot system supply) (4) Line to the load sensing signal relief valve (5) Line to the hydraulic activation solenoid valve (6) Line from the pilot oil filter (7) Line to the hydraulic tank (8) Line to the automatic track tensioning system (9) Test port (track tension system supply) (10) Line for the pilot signal to the swing parking brakes (11) Line to the travel parking brakes and to the travel motors (12) Line from the hydraulic activation solenoid valve to the tank return | |
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| Illustration 2 | g00846550 |
Pilot manifold (1) Pilot manifold (2) Line to the pilot accumulator (3) Test port (pilot system supply) (4) Line to the load sensing signal relief valve (5) Line to the hydraulic activation solenoid valve (6) Line from the pilot oil filter (7) Line to the hydraulic tank (8) Line to the automatic track tensioning system (9) Test port (track tension system supply) (10) Line for the pilot signal to the swing parking brakes (11) Line to the travel parking brakes and to the travel motors (12) Line from the hydraulic activation solenoid valve to the tank return (13) Pilot relief valve (high pressure circuit) (14) Pressure reducing valve (low pressure circuit) (15) Check valve (16) Accumulator (17) Solenoid valve (two-speed travel) (18) Solenoid valve (swing parking brakes) (19) Solenoid valve (dual pressure) (20) Check valve (21) Solenoid valve (travel parking brake) (22) Check valve | |
The pilot manifold is located inside the swing frame near the swing motors. In the pilot manifold, the pilot system oil is divided into the pilot system high pressure circuit and the pilot system low pressure circuit.
Pilot system oil in the pilot system high pressure circuit supplies the automatic track tensioning circuit and the proportional reducing solenoid valve. This pilot system oil is regulated to a pressure of 6750 ± 100 kPa (980 ± 15 psi).
Pilot system oil in the pilot system low pressure circuit supplies the pilot control circuit. This pilot system oil is regulated to a pressure of 4500 ± 100 kPa (650 ± 15 psi).